Europe’s leading privacy enforcement NGO has filed a complaint against Meta over its introduction of an ad-free, paid subscription to its Instagram and Facebook services before the Austrian data protection authority.

The complaint, filed by NOYB—European Center for Digital Rights—centers on the tech giant’s decision to introduce a two-tier model in the EU earlier this month. It requires users to consent to being tracked for targeted advertising or pay a €9.99 monthly fee to use its Instagram and Facebook social networking sites without being tracked.